Checkfit vs StrongLifts 5x5.
StrongLifts is the most recognized name in beginner barbell training. The app runs one specific program; Checkfit writes one. If you're picking between them, it usually comes down to where you are in your training — and whether linear progression still works for you.
What StrongLifts does well
The 5x5 method is battle-tested for absolute beginners. The app guides you through the same five compound lifts — squat, bench, row, overhead press, deadlift — with simple linear progression: add 5lb every session until you stall. Free tier covers the core program; premium runs around $5/mo and unlocks the rest.
Where Checkfit is different
StrongLifts runs one fixed program forever (5x5 with linear progression on the big lifts). Checkfit runs a custom six-week mesocycle that adapts to your performance, includes accessory work alongside the compounds, and progresses with RIR-based math instead of "add 5lb every session." When linear progression stops working — and for most lifters it does within a few months — that's where Checkfit takes over.
At a glance
| Checkfit | StrongLifts | |
|---|---|---|
| Program type | Adaptive 6-week mesocycle | Fixed 5x5 linear |
| Progression | RIR-based, calibrated | Add 5lb per session |
| Exercises | 250+ across all equipment | Five core barbell lifts |
| Equipment | Any setup | Barbell required |
| Price | $17/mo (annual) | Free or $5/mo |
Which one is for you
StrongLifts if you're a true beginner with a barbell and want the simplest possible plan. Checkfit if you've been training long enough that linear progression stopped working — or if you don't have a barbell at all.
